A housing and cooling system for computer hardware includes an infrastructure module and a payload module. The infrastructure module is configured for housing computer hardware and is equipped with either or both of a convective air cooling system and an arrangement of metal plates connected by one or more conduits for carrying liquid for cooling computer equipment housed by the infrastructure module. The infrastructure modules also houses a programmable logic controller (“PLC”). The payload module includes an immersion cooling system governed by the PLC and is located outside of the infrastructure module.